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mt76: remove rx_page_lock 

We can not run mt76u_alloc_buf() concurently, rx_tasklet is stooped
when mt76u_submit_rx_buffers(). We can remove rx_page_lock.

Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
This commit is contained in:
Stanislaw Gruszka 2019-03-21 16:25:27 +01:00 committed by Felix Fietkau
parent a5ba16eb6d
commit 069e2d345c
2 changed files with 1 additions and 8 deletions
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1
drivers/net/wireless/mediatek/mt76/mt76.h
View File

@ -138,7 +138,6 @@ struct mt76_queue {
dma_addr_t desc_dma;
struct sk_buff *rx_head;
struct page_frag_cache rx_page;
spinlock_t rx_page_lock;
};
struct mt76_sw_queue {

8
drivers/net/wireless/mediatek/mt76/usb.c
View File

@ -292,7 +292,6 @@ mt76u_fill_rx_sg(struct mt76_dev *dev, struct mt76u_buf *buf,
struct urb *urb = buf->urb;
int i;
spin_lock_bh(&q->rx_page_lock);
for (i = 0; i < nsgs; i++) {
struct page *page;
void *data;
@ -306,7 +305,6 @@ mt76u_fill_rx_sg(struct mt76_dev *dev, struct mt76u_buf *buf,
offset = data - page_address(page);
sg_set_page(&urb->sg[i], page, sglen, offset);
}
spin_unlock_bh(&q->rx_page_lock);
if (i < nsgs) {
int j;
@ -569,7 +567,6 @@ static int mt76u_alloc_rx(struct mt76_dev *dev)
if (!usb->mcu.data)
return -ENOMEM;
spin_lock_init(&q->rx_page_lock);
spin_lock_init(&q->lock);
q->entry = devm_kcalloc(dev->dev,
MT_NUM_RX_ENTRIES, sizeof(*q->entry),
@ -597,15 +594,12 @@ static void mt76u_free_rx(struct mt76_dev *dev)
for (i = 0; i < q->ndesc; i++)
mt76u_buf_free(&q->entry[i].ubuf);
spin_lock_bh(&q->rx_page_lock);
if (!q->rx_page.va)
goto out;
return;
page = virt_to_page(q->rx_page.va);
__page_frag_cache_drain(page, q->rx_page.pagecnt_bias);
memset(&q->rx_page, 0, sizeof(q->rx_page));
out:
spin_unlock_bh(&q->rx_page_lock);
}
static void mt76u_stop_rx(struct mt76_dev *dev)